React中使用async validator进行表单验证的实例代码

react中进行表单验证毫无疑问是繁琐的,尤其对于动态添加或删除的表单,其验证逻辑更为复杂, 目前UI框架使用material ui ,但其表单处理不太理想,而后研究了一下另一个UI 框架 ant design, 其对表单的处理大大方便了逻辑的编写, 它使用async-validator处理验证逻辑

目前更换框架毫无疑问是不现实的,于是就想直接引入async-validator,下面描述一个简单的使用,具体信息可以去github上查看

validate.js

import Schema from 'async-validator';

function validate (form) {
  let errInfo = {};
  let errStatus = [];
  let descriptor = form.descriptor;
  let validator = new Schema(descriptor);
  validator.validate(form.source, {
    firstFields: true // 如果一个字段对应多个验证规则, 只显示验证失败的第一个规则信息,并不再进行后续规则的验证
  }, (errors, fields) => {
    if (errors) {
      
      errors.forEach(item => {
 errStatus.push(item.message.errStatus);
      });
      errInfo.errors = errors;
      errInfo.isAllValid = !errStatus.includes(true);
      form.callback && form.callback(errInfo);
    }
  });
  return errInfo;
}export default validate;

Form.js

import React from 'react';
import {inject} from 'mobx-react';
import { withStyles } from 'material-ui/styles';
import validate from '../utils/validate';
import {formTest2} from '../utils/validateRules';
import Input, { InputLabel } from 'material-ui/Input';
import { FormControl, FormHelperText } from 'material-ui/Form';
import { MenuItem } from 'material-ui/Menu';
import Select from 'material-ui/Select';
import Button from 'material-ui/Button';
const styles = theme => ({
  container: {
    display: 'flex',
    flexWrap: 'wrap',
  },
  formControl: {
    margin: theme.spacing.unit,
  },
  button: {
    margin: theme.spacing.unit,
    color: '#fff'
  },
});
@inject('rootStore')
@withStyles(styles)
class FormTest2 extends React.Component {
  state = {
    name: {
      value: '',
      errStatus: false,
      errMsg: '请输入name'
    },
    age: {
      value: '',
      errStatus: false,
      errMsg: '请选择age'
    }
  };
  handleChange =(field) => event => {
    if (field === 'name') {
      this.setState({ name: Object.assign(this.state.name, {value: event.target.value}) });
    } else if (field === 'age') {
      this.setState({ age: Object.assign(this.state.age, {value: event.target.value}) });
    }
  };
  handleCheck = (field) => () => {
    if (field === 'name') {
      let errInfo = validate({
 descriptor: formTest2,
 source: {
   name: this.state.name.value,
 }
      });
      this.setState({ name: errInfo.errors[0].message});
    } else if (field === 'age') {
      let errInfo = validate({
 descriptor: formTest2,
 source: {
   age: this.state.age.value,
 }
      });
      this.setState({ age: errInfo.errors[1].message });
    }
  };
  handleSubmit = () => {
    let {name, age} = this.state;
    let errInfo = validate({
      descriptor: formTest2,
      source: {
 name: name.value,
 age: age.value
      }
    });
    errInfo.errors.forEach(item => {
      this.setState({
 [item.field]: item.message
      });
    });
    if (errInfo.isAllValid) {
      console.log('验证成功');
    } else {
      console.log('验证失败');
    }
  };
  render () {
    const { classes } = this.props;
    const {name, age} = this.state;
    return (
      
 
   Name
   
   {name.errMsg}
 
 
   Age
   
     Ten
     Twenty
     Thirty
   
   {age.errMsg}
 
 
   提交
 
      
    )
  }
}

export default FormTest2;

validateRules.js

export const formTest2 = {
  name: {
    validator(rule, value, callback, source, options) {
      
      if (value) {
 callback({
   errMsg: "请输入name",
   value,
   errStatus: false
 });
      } else {
 callback({
   errMsg: "name不能为空",
   value,
   errStatus: true
 });
      }
    }
  },
  age: {
    validator(rule, value, callback, source, options) {
      
      if (value) {
 callback({
   errMsg: "请选择age",
   value,
   errStatus: false
 });
      } else {
 callback({
   errMsg: "必选项",
   value,
   errStatus: true
 });
      }
    }
  },
};

综上为一个小demo,在此基础上可以进行更深层次的封装以便使用。

总结

以上所述是小编给大家介绍的React中使用async validator进行表单验证的实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！